CN103658537B - A kind of formwork preparation method of casting cutter with 4Cr13 - Google Patents
A kind of formwork preparation method of casting cutter with 4Cr13 Download PDFInfo
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- 238000009415 formwork Methods 0.000 title claims abstract description 66
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 238000005266 casting Methods 0.000 title claims abstract description 11
- 239000010410 layer Substances 0.000 claims abstract description 48
- 238000012545 processing Methods 0.000 claims abstract description 20
- 239000002344 surface layer Substances 0.000 claims abstract description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 53
- 239000004576 sand Substances 0.000 claims description 43
- 239000002002 slurry Substances 0.000 claims description 38
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 30
- 238000009413 insulation Methods 0.000 claims description 24
- 238000010792 warming Methods 0.000 claims description 24
- 238000007667 floating Methods 0.000 claims description 22
- KBPLFHHGFOOTCA-UHFFFAOYSA-N 1-Octanol Chemical compound CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 claims description 18
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- 239000000203 mixture Substances 0.000 claims description 15
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- 238000001816 cooling Methods 0.000 claims description 11
- 229910052845 zircon Inorganic materials 0.000 claims description 11
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims description 11
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 9
- 239000013530 defoamer Substances 0.000 claims description 9
- 229940008099 dimethicone Drugs 0.000 claims description 9
- 235000013870 dimethyl polysiloxane Nutrition 0.000 claims description 9
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 9
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical class [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 9
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 9
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 9
- 239000000080 wetting agent Substances 0.000 claims description 9
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- 239000012530 fluid Substances 0.000 claims description 4
- 206010044565 Tremor Diseases 0.000 claims description 3
- 239000004519 grease Substances 0.000 claims description 3
- 239000003906 humectant Substances 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 8
- 230000035939 shock Effects 0.000 abstract description 4
- 235000013372 meat Nutrition 0.000 description 27
- 229910000831 Steel Inorganic materials 0.000 description 8
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- TWJNQYPJQDRXPH-UHFFFAOYSA-N 2-cyanobenzohydrazide Chemical compound NNC(=O)C1=CC=CC=C1C#N TWJNQYPJQDRXPH-UHFFFAOYSA-N 0.000 description 1
- 235000021360 Myristic acid Nutrition 0.000 description 1
- TUNFSRHWOTWDNC-UHFFFAOYSA-N Myristic acid Natural products CCCCCCCCCCCCCC(O)=O TUNFSRHWOTWDNC-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses the formwork preparation method that a kind of 4Cr13 casts cutter, belong to casting field.The steps include: that (1) surface layer is processed: this step keeps room temperature 24 ± 2 DEG C, humidity 50-70%; (2) intermediate layer processing: intermediate layer is divided into two-layer, ground floor and the second layer, this step keeps room temperature 24 ± 2 DEG C, humidity 60-70%; (3) backing layer processing: backing layer is divided into two-layer, ground floor and the second layer, this step keeps room temperature 24 ± 2 DEG C, humidity 40-60%; (4) dewax; (5) formwork roasting.The present invention strictly controls the parameters of each step, and make the product defects that obtains less, formwork precision prepared by the present invention is high, shock-resistant, simultaneously the coefficient of expansion of formwork and 4Cr13 close, be suitable for adopting 4Cr13 to pour into a mould cutter.
Description
Technical field
The invention belongs to casting field, specifically, relate to the formwork preparation method that a kind of 4Cr13 casts cutter, more particularly, relate to a kind of preparation method of processing thickness and being less than or equal to the hot investment casting formwork used of the blade of 4mm.
Background technology
Cutter is the instrument for machining in machine-building, also known as cutting element.Most cutters is that machine is used, but also has hand.Because the cutter used in machine-building is substantially all for cutting metal material, thus " cutter " one word be generally just interpreted as metal cutting tool.The cutter cutting timber is then called wood cutter.Also have a class cutter of special application, for geological prospecting, well-digging, mine probing, be called mine cutter.And for food service industry, application of cutting tool also gets more and more, such as meat grinder, meat grinder is the indispensable in process of production instrument of meat packing enterprise, its graininess meat stuffing that raw meat can not be waited by different process requirement processing specification, so that fully mix the demand meeting different product with other auxiliary material.Raw meat shreds by the shear action utilizing the cutoff edge rotated to become with eyelet tooth shape on orifice plate during meat grinder work, and under the effect of screw extruding power, is constantly discharged outside machine by raw material.During use, according to the difference of material properties and processing request, corresponding cutter and top cover can be configured, the particle of different size can be processed, to meet the technological requirement of next procedure.Similar with meat grinder same principle machine have a lot, and need to use 4Cr13 to process as this kind of food machinery of meat grinder, because the blade place of cutoff edge is thinner, so major part is all adopt machined, adopt lacking of casting, and precision is inadequate, the product of casting cast thickness can only be greater than the blade of 5mm.
The patent of present meat grinder has a lot, such as, Chinese Patent Application No.: 201210222914.3, publication date on October 17th, 2012, disclose the patent document that a name is called a kind of meat grinder, this invention comprises housing, gear, gear shaft, motor cabinet, three-way pipe, gear, gear shaft and motor cabinet are all arranged in housing, ledger-plate is provided with in described three-way pipe, cross blade and splash bar, three-way pipe comprises feed pipe, discharge nozzle and interior pipe, gear shaft is hollow tubular structure, the end of splash bar is provided with the jacking block stretching out pipe in three-way pipe, one end of gear shaft is provided with the axle plug filled in gear central siphon, the other end of gear shaft and described jacking block clamping, the stage clip be placed in gear shaft is provided with between axle plug and jacking block, jacking block is withstood in stage clip one end, the other end withstands stage clip.Top cover is called nut (effect is equivalent to top cover) in this patent.
For another example, China Patent No.: 200810027396.3, publication date on September 3rd, 2008, disclose the patent document that a name is called a kind of meat grinder, this invention comprises with meat admitting port, the meat grinder main body of meat mincing outlet, be arranged on the meat mincer in meat grinder main body, be arranged on the power set of meat grinder body rear, meat mincing outlet is arranged on the front end of meat grinder main body, meat admitting port is arranged on the sidewall of meat grinder main body, meat mincer is connected with power set by power transmission shaft, it is characterized in that, seal washer is provided with between meat mincer root and meat grinder body rear axis hole end face.Compared with the prior art this invention, has and can prevent the gravy in meat grinder from infiltering advantage in axis hole.
But seldom there is patent to relate to concrete parts production problem, especially when material is stainless steel material 4Cr13, how for specifically how building, the aspect research such as shell processed is less, but it is but very important in actual production, it is important to note that workpiece easily shrinks and causes off-dimension in the process that cools after building of blade, reserve excessive when designing, need to further consider mach problem.
So in the urgent need to a kind of blade method that 4Cr13 cast thickness can be adopted to be less than or equal to 4mm, enhance productivity and product percent of pass, key point is to design a kind of good formwork, the shrinkage factor of 4Cr13 can be adapted to, and subsiding can not appear in this formwork, come off or the situation of crackle, the casting of the workpiece being less than or equal to 4mm blade with thickness so just can be completed.
Summary of the invention
The problem that 1, will solve
The product percent of pass processed for prior art is low, defect often causes processing the problem that employing 4Cr13 is material, cast thickness is less than or equal to the blade of 4mm, the invention provides the formwork preparation method that a kind of 4Cr13 casts cutter, the formwork precision prepared by the present invention is high, shock-resistant, simultaneously the coefficient of expansion of formwork and 4Cr13 the most close.
2, technical scheme
For solving the problem, the present invention adopts following technical scheme.
Cast a formwork preparation method for cutter with 4Cr13, the steps include:
(1) surface layer processing: this step keeps room temperature 24 ± 2 DEG C, humidity 50-70%;
1. clean: wax-pattern is put into cleaning fluid, moves up and down, wash wax bits and the grease on surface;
2. be stained with slurry: tilted by wax-pattern 45 ° and be pressed in slurries, uniform rotation, allow slurries evenly fill on wax-pattern;
3. sand is drenched: be rotating by wax-pattern to put into and drench sand machine, by the surface of zircon sand uniform adhesion at slurries, slurries can not be allowed to pile up; Drying time is 7-8h;
(2) intermediate layer processing: intermediate layer is divided into two-layer, ground floor and the second layer, this step keeps room temperature 24 ± 2 DEG C, humidity 60-70%;
4. prewet: tremble the floating sand in clean surface, wax-pattern is put into pre-humectant 2-3s, suspension is dripped clean;
5. be stained with slurry: tilted by wax-pattern 45 ° and be pressed in slurries, uniform rotation, allow slurries evenly fill on wax-pattern;
6. floating sand: be rotating by wax-pattern and put into floating sand bucket, by the surface of zircon sand uniform adhesion at slurries, guarantees to have not by position that floating sand adheres to; Drying time is 8-9h;
7. the second layer: repeat step 5. and 6.;
(3) backing layer processing: backing layer is divided into two-layer, ground floor and the second layer, this step keeps room temperature 24 ± 2 DEG C, humidity 40-60%;
5. and 6. 8. process ground floor, repeat step; But the drying time of this step is 12-15h;
9. process the second layer, repeat step 8.; Formwork is obtained after drying;
(4) dewax; Dewaxing parameter: vapour pressure 0.8-0.9MPa; Dewaxing time 10min, dewaxing temperature is 180 ± 5 DEG C; Under after dewaxing, formwork is placed in ventilation condition, air-dry time is more than or equal to 20h(, and this is determined according to the concrete composition of wax and size);
(5) formwork roasting: by formwork roasting, first formwork is heated to 200-300 DEG C, insulation 1-2h, is warming up to 450-700 DEG C subsequently, insulation 1-2h, then is warming up to 900-1050 DEG C, and insulation 2-3h, is finally warming up to 1180-1210 DEG C, cooling; Obtain desired formwork.
During use, be that the formwork in step (5) is heated to 1250 ± 5 DEG C, be poured into by molten steel in formwork, the composition of molten steel is: C:0.38%, Si :≤0.60%, Mn :≤0.80%, S :≤0.030%, P :≤0.035%, Cr:13.00%, surplus is the molten steel of Fe, air cooling.
Preferably, composition and the mass ratio thereof of the slurries of the middle surface layer of described step (1) are: 400 object zirconium dioxides 23%, and content is the wetting agent OP-10 of 0.8%, dimethicone 0.5%, polyvinyl alcohol 0.1%, defoamer n-octyl alcohol 0.9%, surplus is Ludox, and viscosity is 40 ± 2S.The measurement of viscosity of the present invention is the volume used according to Chinese Industrial Standards (CIS) is l00ml, and tap hole diameter is the standard drink of 6mm ± 0.2mm.
Preferably, composition and the mass ratio thereof of described step (2) intermediate layer slurries are: 350 object zirconium dioxides 29%, and content is the wetting agent OP-10 of 0.7%, dimethicone 0.4%, polyvinyl alcohol 0.4%, defoamer n-octyl alcohol 0.8%, surplus is Ludox, and viscosity is 17 ± 2S.
Preferably, composition and the mass ratio thereof of the middle backing layer slurries of described step (3) are: 100 object zirconium dioxides 31%, and content is the wetting agent OP-10 of 0.7%, dimethicone 0.3%, polyvinyl alcohol 0.4%, defoamer n-octyl alcohol 0.7%, surplus is Ludox, and viscosity is 12 ± 1S.
Preferably, the zircon sand that the step in described step (1) 3. adopts is 110-120 object zirconia powder; Step 6. in floating sand be 70-80 object zirconia powder; Although backing layer add man-hour step be 8. repetition step 5. and 6., the floating sand of this step replaces with 50-60 object zirconia powder.
Preferably, in described step (6), the roasting of formwork is: first formwork is heated to 260 DEG C, and insulation 1.5h, is warming up to 630 DEG C subsequently, insulation 1.5h, then is warming up to 970 DEG C, and insulation 2.5h, is finally warming up to 1200 DEG C, cooling.
Preferably, in described step (6), the roasting of formwork is: first formwork is heated to 260 DEG C, and insulation 1.5h, is warming up to 630 DEG C subsequently, insulation 1.5h, then is warming up to 970 DEG C, and insulation 2.5h, is finally warming up to 1200 DEG C, cooling.
3, beneficial effect
Compared to prior art, beneficial effect of the present invention is:
(1) although the present invention's main process and prior art similar, but for the parameters of each step, it is more accurate that the present invention controls, the defect of the formwork obtained is less, especially still zero defect when formwork produced by the cutter being less than or equal to 4mm for thickness, improve machining accuracy, this does not disclose in former document, is also according to existing document cannot draw again in conjunction with limited number of time experiment simultaneously;
(2) composition of the slurries of surface layer and mass ratio thereof in considered critical of the present invention molding shell, the starting point of this point breaks through original design concept completely, no longer only consider shape and mechanical property, but consider natural shrinking rate to keep synchronous with 4Cr13, formwork precision is high, shock-resistant, simultaneously the coefficient of expansion of formwork and 4Cr13 the most close, particular avoid and subside, come off and the generation of crackle, the blade of building is indeformable, and defect is few;
(3) cost of the present invention is low, and raw material is simple, and the formwork processed can directly be used for building blade.
Detailed description of the invention
Describe the present invention below in conjunction with embodiment.
Embodiment 1
Cast a formwork preparation method for cutter with 4Cr13, the steps include:
(1) surface layer processing: this step keeps room temperature 24 ± 2 DEG C, humidity 56%; The wax-pattern preparing the workpiece that will process in advance is needed before processing;
1. clean: wax-pattern is put into cleaning fluid, moves up and down, wash wax bits and the grease on surface; Here cleaning fluid conventional in plant produced is adopted;
2. be stained with slurry: tilted by wax-pattern 45 ° and be pressed in slurries, uniform rotation, allow slurries evenly fill on wax-pattern; The composition of slurries and mass ratio thereof are: 400 object zirconium dioxides 23%, and content is the wetting agent OP-10 of 0.8%, dimethicone 0.5%, polyvinyl alcohol 0.1%, defoamer n-octyl alcohol 0.9%, and surplus is Ludox, and viscosity is 40 ± 2S;
3. sand is drenched: be rotating by wax-pattern to put into and drench sand machine, by the surface of zircon sand uniform adhesion at slurries, slurries can not be allowed to pile up; Drying time is 8h; The zircon sand adopted is 115 object zirconia powders;
(2) intermediate layer processing: intermediate layer is divided into two-layer, ground floor and the second layer, this step keeps room temperature 24 ± 2 DEG C, humidity 67%;
4. prewet: tremble the floating sand in clean surface, wax-pattern is put into pre-humectant 2-3s, suspension is dripped clean;
5. be stained with slurry: tilted by wax-pattern 45 ° and be pressed in slurries, uniform rotation, allow slurries evenly fill on wax-pattern; The composition of slurries and mass ratio thereof are: 350 object zirconium dioxides 29%, content is that the OP-10 at this place of wetting agent OP-10(of 0.7% is produced by Dongyang City Dongxing Chemical Co., Ltd.), dimethicone 0.4%, polyvinyl alcohol 0.4%, defoamer n-octyl alcohol 0.8%, surplus is Ludox, and Ludox selects 830 of the production of Xiantao City Jin Wei Chemical Co., Ltd., and the viscosity of mixing rear slurry is 17 ± 2S;
6. floating sand: be rotating by wax-pattern and put into floating sand bucket, by the surface of zircon sand uniform adhesion at slurries, guarantees to have not by position that floating sand adheres to; Drying time is 9h; Floating sand is 75 object zirconia powders;
7. the second layer: repeat step 5. and 6.;
(3) backing layer processing: backing layer is divided into two-layer, ground floor and the second layer, this step keeps room temperature 24 ± 2 DEG C, humidity 43%;
5. and 6. 8. process ground floor, repeat step; But the drying time of this step is 12-15h, the composition of slurries used and mass ratio thereof are: 100 object zirconium dioxides 31%, and content is the wetting agent OP-10 of 0.7%, dimethicone 0.3%, polyvinyl alcohol 0.4%, defoamer n-octyl alcohol 0.7%, surplus is Ludox, and viscosity is 12S; The floating sand of this step replaces with 55 object zirconia powders;
9. process the second layer, repeat step 8.; Formwork is obtained after drying; Formwork prepared by this technique has two effects, and first is that the mechanical property of formwork is good, shock-resistant; Second is that shrinkage and follow-up molten steel are close, and shrinkage factor only differs 0.05%, can consider the problem of shrinkage factor like this during design, time saving and energy saving;
(4) dewax; Dewaxing parameter: determine according to the concrete composition of wax and size, the wax of the present embodiment adopts stearic acid+4% myristic acid of the paraffin+35% of 62% to mix, vapour pressure 0.8-0.9MPa; Dewaxing time 10min, dewaxing temperature is 180 ± 5 DEG C; Under after dewaxing, formwork is placed in ventilation condition, air-dry time is more than or equal to 20h;
(5) formwork roasting: by formwork roasting, is first heated to 260 DEG C by formwork, and insulation 1.5h, is warming up to 630 DEG C subsequently, insulation 1.5h, then is warming up to 970 DEG C, and insulation 2.5h, is finally warming up to 1200 DEG C, cooling; Obtain desired formwork, these numerical value are to prevent formwork ftracture and reduce follow-up manufacturing deficiency.
During use, that the formwork in step (5) is heated to 1250 ± 5 DEG C, be poured into by molten steel in formwork, the composition of molten steel is: C:0.38%, Si :≤0.60%, Mn :≤0.80%, S :≤0.030%, P :≤0.035%, Cr:13.00%, and surplus is the molten steel of Fe; Air cooling.The shrinkage factor of formwork in cooling procedure is substantially equal with the shrinkage factor of molten steel; The thinnest part only 2mm of the cutoff edge of the meat grinder built, without distortion, zero defect, just can directly use building after mouth is polished.
Embodiment 2
With embodiment 1, air humidity 50% when difference is the processing of step (1) surface layer; The drying time that 3. step drenches sand is 7h; The zircon sand adopted is 110 object zirconia powders; Intermediate layer adds humidity 60% in man-hour in step (2); The drying time that 6. step floats sand is 8h; Floating sand is 80 object zirconia powders; During the processing of step (3) backing layer, air humidity is 40%; Step 8. in drying time be 12h, floating sand is 50 object zirconia powders; The formwork roasting of step (5): by formwork roasting, is first heated to 200 DEG C by formwork, and insulation 2h, is warming up to 450 DEG C subsequently, insulation 2h, then is warming up to 900 DEG C, and insulation 3h, is finally warming up to 1180 DEG C, cooling; Obtain desired formwork, these numerical value are to prevent formwork ftracture and reduce follow-up manufacturing deficiency.The thinnest part only 4mm of the cutoff edge of the meat grinder built, without distortion, zero defect, just can directly use building after mouth is polished.
Embodiment 3
With embodiment 1, air humidity 70% when difference is the processing of step (1) surface layer; The drying time that 3. step drenches sand is 8h; The zircon sand adopted is 120 object zirconia powders; Intermediate layer adds humidity 70% in man-hour in step (2); The drying time that 6. step floats sand is 9h; Floating sand is 70 object zirconia powders; During the processing of step (3) backing layer, air humidity is 60%; Step 8. in drying time be 15h, floating sand is 60 object zirconia powders; The formwork roasting of step (5): by formwork roasting, is first heated to 300 DEG C by formwork, and insulation 1h, is warming up to 700 DEG C subsequently, insulation 1h, then is warming up to 1050 DEG C, and insulation 2h, is finally warming up to 1210 DEG C, cooling; Obtain desired formwork, these numerical value are to prevent formwork ftracture and reduce follow-up manufacturing deficiency.The thinnest part only 1mm of the cutoff edge of the meat grinder built, without distortion, zero defect.
Claims (5)
1. cast a formwork preparation method for cutter with 4Cr13, the steps include:
(1) surface layer processing: this step keeps room temperature 24 ± 2 DEG C, humidity 50-70%;
1. clean: wax-pattern is put into cleaning fluid, moves up and down, wash wax bits and the grease on surface;
2. be stained with slurry: tilted by wax-pattern 45 ° and be pressed in slurries, uniform rotation, allow slurries evenly fill on wax-pattern;
The composition of slurries and mass ratio thereof are: 400 object zirconium dioxides 23%, and content is the wetting agent OP-10 of 0.8%, dimethicone 0.5%, polyvinyl alcohol 0.1%, defoamer n-octyl alcohol 0.9%, and surplus is Ludox, and viscosity is 40 ± 2S;
3. sand is drenched: be rotating by wax-pattern to put into and drench sand machine, by the surface of zircon sand uniform adhesion at slurries, slurries can not be allowed to pile up; Drying time is 7-8h;
(2) intermediate layer processing: intermediate layer is divided into two-layer, ground floor and the second layer, this step keeps room temperature 24 ± 2 DEG C, humidity 60-70%;
4. prewet: tremble the floating sand in clean surface, wax-pattern is put into pre-humectant 2-3s, suspension is dripped clean;
5. be stained with slurry: tilted by wax-pattern 45 ° and be pressed in slurries, uniform rotation, allow slurries evenly fill on wax-pattern;
6. floating sand: be rotating by wax-pattern and put into floating sand bucket, by the surface of zircon sand uniform adhesion at slurries, guarantees to have not by position that floating sand adheres to; Drying time is 8-9h;
7. the second layer: repeat step 5. and 6.;
(3) backing layer processing: backing layer is divided into two-layer, ground floor and the second layer, this step keeps room temperature 24 ± 2 DEG C, humidity 40-60%;
5. and 6. 8. process ground floor, repeat step; But the drying time of this step is 12-15h;
9. process the second layer, repeat step 8.; Formwork is obtained after drying;
(4) dewax;
(5) formwork roasting: by formwork roasting, first formwork is heated to 200-300 DEG C, insulation 1-2h, be warming up to 450-700 DEG C subsequently, insulation 1-2h, then be warming up to 900-1050 DEG C, insulation 2-3h, is finally warming up to 1180-1210 DEG C, and cooling obtains desired formwork.
2. a kind of formwork preparation method of casting cutter with 4Cr13 according to claim 1, it is characterized in that: composition and the mass ratio thereof of described step (2) intermediate layer slurries are: 350 object zirconium dioxides 29%, content is the wetting agent OP-10 of 0.7%, dimethicone 0.4%, polyvinyl alcohol 0.4%, defoamer n-octyl alcohol 0.8%, surplus is Ludox, and viscosity is 17 ± 2S.
3. a kind of formwork preparation method of casting cutter with 4Cr13 according to claim 1, it is characterized in that: composition and the mass ratio thereof of the middle backing layer slurries of described step (3) are: 100 object zirconium dioxides 31%, content is the wetting agent OP-10 of 0.7%, dimethicone 0.3%, polyvinyl alcohol 0.4%, defoamer n-octyl alcohol 0.7%, surplus is Ludox, and viscosity is 12 ± 1S.
4. according to a kind of formwork preparation method of casting cutter with 4Cr13 in claim 1-3 described in any one, it is characterized in that: the zircon sand that the step in described step (1) 3. adopts is 110-120 object zirconia powder; Step 6. in floating sand be 70-80 object zirconia powder; Although backing layer add man-hour step be 8. repetition step 5. and 6., the floating sand of this step replaces with 50-60 object zirconia powder.
5. a kind of formwork preparation method of casting cutter with 4Cr13 according to claim 4, it is characterized in that: in described step (5), the roasting of formwork is: first formwork is heated to 260 DEG C, insulation 1.5h, be warming up to 630 DEG C subsequently, insulation 1.5h, then be warming up to 970 DEG C, insulation 2.5h, finally be warming up to 1200 DEG C, cooling.
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| CN104841883A (en) * | 2015-05-05 | 2015-08-19 | 柳州科尔特锻造机械有限公司 | Precision casting process of casting part |
| CN110961578B (en) * | 2019-12-25 | 2021-03-02 | 无锡阿尔法精密机械制造有限公司 | Wax mould sand shell forming process |
| CN111570719A (en) * | 2020-05-20 | 2020-08-25 | 无锡卡仕精密科技有限公司 | Silica sol modified coating for precision casting |
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| CN103008549A (en) * | 2013-01-21 | 2013-04-03 | 贵州红林机械有限公司 | Method for manufacturing investment pattern shell with narrow and curved cavity of casting |
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| CN101104195A (en) * | 2007-08-02 | 2008-01-16 | 哈尔滨工业大学 | Method for preparing casting titanium and titanium-aluminum base alloy porous ceramic mould shell |
| CN101362184A (en) * | 2008-09-08 | 2009-02-11 | 莱芜市泰钢新材料有限责任公司 | Manufacture method of stainless steel, carbon steel precision casting surface shell |
| CN101590513A (en) * | 2009-07-03 | 2009-12-02 | 郑州神牛铸造有限公司 | Method for evaporative pattern precise composite casting |
| CN101670418A (en) * | 2009-10-20 | 2010-03-17 | 莱芜市泰钢新材料有限责任公司 | Shell making process for elongated hole flange investment casting |
| CN102921889A (en) * | 2012-11-07 | 2013-02-13 | 西安西工大超晶科技发展有限责任公司 | Precision investment casting casing-making method suitable for stainless steel casting |
| CN103008549A (en) * | 2013-01-21 | 2013-04-03 | 贵州红林机械有限公司 | Method for manufacturing investment pattern shell with narrow and curved cavity of casting |
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| CN103658537A (en) | 2014-03-26 |
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